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TS5A22364: VCC input ripple effect

Tiger Yeh
Expert 4545 points
Part Number: TS5A22364

Hi,

If to use TS5A22364 for audio path switching, may I know whether there is any VCC input voltage noise requirement?

I would like to check whether below 5V input voltage ripple noise is okay or it will affect audio path noise or not?

Please advise.

Thanks and Best regards,

Tiger

  • 0
    TI__Mastermind 25363 points

    Hey Tiger,

    Your performance may fluctuate a bit but technically the VCC is recommended between 2.3V to 5.5V so it won't really damage the device. Can you not add a decoupling cap on the supply to stablize it a bit?

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    TI__Expert 4545 points

    Thanks for reply! Rami

    Here is question from my customer.

    ==========================================

    Could you define SPEC for this fluctuation? We added a feedback cap to improve this ripple/fluctuation and improve the Audio noise problem, but we need TI to provide ripple's SPEC.

    Thanks and Best regards,

    Tiger

  • 0 in reply to Tiger Yeh
    TI__Mastermind 25363 points

    Hey Tiger,

    There isn't a defined spec for the fluctuation, we recommend a decoupling cap to help with the noise. You'll just be seeing change in performance but it's not necessarily something that would damage the device so there really isn't anything we could be specifying. if they can't filter the noise out, then I'd just recommend keeping the spikes below the recommended VDD level.
    That being said, I'll repeat my previous question here. Do they have decoupling caps and if not, can they add more capacitance on the supply to help here?

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    TI__Expert 4545 points

    Hi Rami,

    Yes, customer has decoupling cap for VDD. To add more capacitance will improve the noise performnace.

    They just want to check any additional input voltage noise requirement. 

    Thanks and Best regards,

    Tiger